113 results about "Graphyne" patented technology

The invention discloses a method for preparing a graphite alkyne film. The method comprises that: a copper sheet or any one substrate the surface of which is covered with a copper film layer is used as a substrate; 6-alkynyl-benzene is subjected to coupling reaction in a solvent under the catalytic action of the copper to obtain the graphite alkyne film on the surface of the substrate. The method for preparing the graphite alkyne film, which is provided by the invention, has simple and convenient process, and can carry out large-scale preparation of the graphite alkyne film on the surface of the copper sheet or the substrate any surface of which is covered with the copper. The electrical conductivity of the graphite alkyne film is 2.516*10-4S/m. The film has uniform surface, can exist stably in the air, is a semiconductor with similar performances with silicon, and has potential application prospect in the fields of catalysis, electron, semiconductor, energy, material and the like.

The invention discloses a nitrogen-doped graphdiyne riveted transition metal monatomic catalyst as well as a preparation method and application thereof. According to the catalyst, nitrogen atoms are doped in a novel carbon material graphdiyne carrier, transition metal single atoms are riveted on the surface of nitrogen-doped graphdiyne through the covalent effect between the transition metal single atoms and N and C atoms, and thus transition metal is uniformly dispersed on the surface of the nitrogen-doped graphdiyne in a single atom form to form the catalyst. Transition metal atoms in the catalyst are uniformly dispersed on the surface of the nitrogen-graphdiyne-based catalyst in a single atom state, a large number of active sites are provided for oxidation-reduction reaction, graphdiyneis adopted as a carbon substrate and has excellent morphological characteristics, formation of catalytic active sites is facilitated, and catalytic advantages of single atoms are brought into play. The catalyst disclosed by the invention has high electrocatalytic activity on oxygen reduction under an alkaline condition, is simple and effective in preparation process, low in cost and easy to popularize and put into production, and has important significance in the field of fuel cell development and application.

The invention discloses a preparation method of an N-containing graphdiyne material, wherein the preparation method comprises the steps: by using an N-containing six-membered heterocyclic compound anda metal alkyne compound as raw materials and ethanol as a solvent, carrying out ultrasonic reaction under the condition of ultrasonic frequency of 50-55 kHz, separating after the reaction is finished, washing a collected solid, and drying to obtain the N-containing graphdiyne material. The N-containing graphdiyne material is prepared by adopting an ultrasonic method, taking the N-containing six-membered heterocyclic compound and a metal alkyne compound as raw materials and taking ethanol as a solvent, nitrogen elements in the prepared N-containing graphdiyne material are distributed orderly,and the whole preparation method is simple to operate, mild in condition, green, environment-friendly and relatively low in equipment requirement; besides, experiments show that the N-containing graphdiyne material prepared by the method has excellent hydrogen evolution performance and energy storage performance, effectively promotes the application of the graphdiyne material in the fields of hydrogen evolution materials, supercapacitors, lithium ion battery negative electrode materials and the like, and has a wide industrial application prospect.

The invention provides a N-doped graphdiyne material and a preparation method and application thereof. In the N-doped graphdiyne material, a sp hybrid state nitrogen element is contained. The sp hybrid nitrogen atom is contained in the N-doped graphdiyne material, in other words, the N-doped graphdiyne material contains the nitrogen element existing in a carbon-nitrogen triple-bond mode.

The invention discloses a preparation method of hetero-atom-doped graphyne, and belongs to the field of preparation of a doped nanometer material. The defect of single structure and performance of a graphyne material in the prior art can be overcome. The method comprises the following steps: drying a graphyne sample, putting the graphyne sample in a temperature programmed tubular furnace, beginning temperature programming, adding a simple substance or compound containing a doped element, and performing a reaction in a temperature range of 500-1500 DEG C to obtain the doped graphyne with the doped element substituted or added. The preparation method is simple in process and convenient to operate, and the doped graphyne can be obtained with no need of complex equipment. The preparation method is suitable for industrial production.

The invention relates to a preparation method of a graphdiyne-loaded monatomic catalyst, which belongs to the technical field of preparation of monatomic catalysts. The technical problems of atom aggregation and carrier structure damage easily caused by instability of existing metal monatomic and carrier materials at continuous high temperature is solved. The method comprises the steps of 1 mixinghexabromobenzene and calcium carbide, dissolving in ethanol, and grinding; 2 centrifuging, washing and calcining the generated reaction product; 3 carrying out acid washing treatment on the calcinedproduct to obtain graphdiyne; 4 soaking graphdiyne in a metal precursor solution to obtain graphdiyne loaded with a metal precursor; and 5 carrying out joule heating treatment on the graphdiyne loadedwith the metal precursor to a certain temperature to obtain the graphdiyne-loaded metal monoatomic catalyst. The monoatomic catalyst prepared by the method can prevent continuous high temperature from damaging the stability of the catalyst carrier, and atom aggregation is avoided.

The invention belongs to the field of graphdiyne film preparation, and particularly relates to a preparation method of an ultrathin nanoscale graphdiyne film. The preparation method comprises the following steps: preparing an ultrathin graphdiyne film by adopting plasma etching; placing a copper substrate attached with the original graphdiyne film in a plasma etching machine; injecting oxygen intothe cavity of the plasma etching machine, and performing etching; and transferring the film to a target substrate by using a PMMA auxiliary process after the etching, and removing PMMA to obtain theultrathin graphdiyne film. The preparation method adopts the plasma etching to prepare the ultrathin graphdiyne film, and the plasma etching is carried out on graphdiyne grown on a solution on the copper substrate to reduce the thickness of the graphdiyne, and then the graphdiyne is transferred to another substrate, so that complex chemical treatment is omitted, the ultrathin nanoscale graphdiynefilm is obtained, and a large number of functional groups generated by side reactions of graphdiyne are removed.

The invention relates to a preparation method of a human measles immune sensor based on graphdiyne and a silver nanoparticle cage, and belongs to the technical field of novel biological sensing and detection. Graphdiyne is of a carbon-carbon triple-bond linear structure with an sp hybridized state and has the advantages of zero cis-trans-isomer, high conjugation and the like; due to excellent electrical, optical and photoelectric properties, graphdiyne is a key material of a novel electronic and photoelectric device of the next generation. Meanwhile, by the use of good pi-pi conjugation effect, a high-flux load of signal molecules is realized, and a signal error caused by instable combination is reduced. Therefore, the human measles immune sensor based on graphdiyne and the silver nanoparticle cage can sensitively detect measles viruses.

The invention discloses a preparation method of a graphdiyne film and the graphdiyne film prepared by the method. The method comprises the following steps: (1) mixing a catalyst with water to obtain acatalyst solution; (2) mixing a monomer with an organic solvent to obtain a monomer solution, and adding tetrabutylammonium fluoride into the monomer solution to obtain a hexaalkynyl benzene solution; (3) mixing the hexaalkynyl benzene solution, the catalyst solution and water, and uniformly mixing in an inert gas atmosphere under the action of stirring to obtain a mixed solution; and (4) reacting the mixed solution, and separating from the reaction product to obtain the graphdiyne film. Through the method, the graphdiyne film with high yield can be simply and efficiently obtained, and industrial production is easy.

The invention discloses thick-film resistor paste and a thick-film resistor prepared from the thick-film resistor paste. A proper amount of graphdiyne is added into thick-film resistor paste in the form of a paste additive or a proper amount of graphdiyne is introduced into the thick-film resistor paste in the form of a glass powder additive. The thick-film resistor paste can be used for preparinga thick-film resistor which is stable in resistance temperature change and small in electrostatic discharge resistance and/or encapsulation change rate.

The invention discloses a preparation and modulation method of a photoelectric synaptic device. The preparation method comprises the following steps: preparing a field effect transistor structure comprising a gate layer, a dielectric layer, a source electrode and a drain electrode; transferring a graphene thin film over the source electrode and the drain electrode; processing the graphene film into a conductive channel; and preparing a graphdiyne thin film on the surface of the graphene thin film processed into the conductive channel to obtain the photoelectric synapse device of the field effect transistor structure. According to the invention, the graphene film is transferred above the source electrode and the drain electrode, the graphdiyne thin film is prepared on the surface of the graphene thin film to obtain the photoelectric synapse device of the field effect transistor structure, by preparing the graphdiyne thin film on the surface of the graphene thin film, the light wave response range is widened, regulation and control of light signals and electric signals are achieved through the field effect transistor structure, and therefore the requirements under complex applicationscenes are met. The method can be widely applied to the technical field of artificial neural networks.

The invention discloses a preparation method of a three-dimensional graphdiyne/Fe3O4 nano composite material. The preparation method comprises the steps: (1) treating three-dimensional graphdiyne; and(2) mixing FeCl3 and FeCl2 solutions with a certain concentration, and violently stirring under the protection of nitrogen; dispersing the treated graphdiyne GDY into the mixed solution, keeping theconstant temperature of 30-50 DEG C, dropwise adding strong base, adjusting the pH value of the solution, quickly heating after reacting for a period of time, and continuously carrying out stirring reaction for a period of time at a constant temperature; and finally, naturally cooling to room temperature, separating, cleaning, and carrying out vacuum drying to obtain the three-dimensional graphdiyne/Fe3O4 nano composite material. According to the composite material, a three-dimensional surface structure of GDY, a great effective surface area and excellent surface characteristics of graphdiyneare utilized, Fe3O4 nano-particles are compactly and uniformly loaded on the surfaces of graphdiyne nano-sheets, and the stability and dispersity of the Fe3O4 nano-particles are greatly improved. Thecomposite material can be used for sewage purification.

The invention belongs to the technical field of catalysts, and particularly relates to a preparation method and application of a graphdiyne in-situ grown metal organic framework material. The preparation method comprises the following steps: evenly dispersing graphdiyne in ethyl alcohol, adding transition metal salt for dissolution, and conducting drying to obtain graphdiyne having adsorbed metalsalt; carrying out a hydrothermal reaction on organic ligand and the graphdiyne having adsorbed metal salt to obtain a metal organic framework material growing on graphdiyne in situ; and carrying outa pyrolysis reaction to obtain the graphdiyne in-situ grown metal organic framework material. According to the invention, graphdiyne and a metal organic framework material are combined through an in-situ growth technology, a non-noble metal-based oxygen reduction electrocatalytic material with high half-wave potential under an alkaline condition is prepared, and the problems that a noble metal catalyst is high in cost and low in reserves in the prior art are solved.

The invention belongs to the technical field of functional materials, and particularly relates to a soluble graphdiyne derivative, and a preparation method and application thereof. Compared with graphdiyne, the dissolvability of the graphdiyne derivative disclosed by the invention in an organic solvent is greatly improved. For example, the graphdiyne derivative provided by the invention has good solubility in polar organic solvents such as dichloromethane, chlorobenzene, N-methylpyrrolidone (NMP) and tetrahydrofuran, and the concentration of the graphdiyne derivative is up to 5mg.ml<-1> in chlorobenzene; and therefore, the problem that graphdiyne is difficult to disperse or dissolve in a solution is solved, and the graphdiyne derivative has great application value.

The invention discloses an odorless asphalt mixture, a preparation method thereof and an application of the odorless asphalt mixture on a pavement, and the preparation method comprises the following steps: carrying out low-temperature plasma modification on a graphdiyne nano material to obtain a graphdiyne modified solution; mixing 1-10 parts by weight of magnesium hydroxide, 1-2 parts by weight of TEOS, 1-5 parts by weight of vegetable oil, 1-10 parts by weight of SBS and 1-2 parts by weight of an odor inhibitor to obtain an asphalt composite modifier; heating the matrix asphalt to 150 to 170DEG C; then adding an asphalt composite modifier and graphdiyne modification liquid; wherein the weight ratio of the matrix asphalt to the asphalt composite modifier to the graphdiyne modification liquid is 100: (1-5): (10-25), shearing and heating to 185-220 DEG C, shearing and swelling for 0.5-2 hours, then cooling to 170-180 DEG C to obtain the odorless asphalt mixture, drying and packaging toobtain the odorless asphalt mixture. By selecting a novel nano material graphdiyne, compared with traditional materials such as graphene and carbon nanotubes, the optimization efficiency of the performance of the odorless asphalt is higher.

The invention relates to a method for detecting dopamine by an acidified graphdiyne nanotube/short multi-walled carbon nanotube modified electrode. By using composite graphdiyne nanotubes GDY and short multi-walled carbon nanotubes S-MWCNTs as electrode modification materials, a GDY/S-MWCNTs modified electrode for detecting dopamine with high sensitivity and high selectivity is prepared. As the GDY has a tremella-shaped three-dimensional surface structure, the GDY has a great effective surface area and shows ultrahigh DA enrichment capacity. The S-MWCNTs are obtained by ultrasonically treatingthe multi-walled carbon nanotubes in mixed acid, can be inserted into acupuncture points on the GDY nanotubes and are in full contact with the GDY nanosheets, so that a good way is provided for accelerating electron transmission of a sensor interface. Because the surfaces of the acidified GDY and S-MWCNT contain a large number of chemical oxygen-containing groups, some interferent molecules can be eliminated through electrostatic repulsion, so that the selectivity of a sensor interface to DA is improved. A modified electrode prepared from the material has good response performance to dopaminedetection, and the lowest detection limit can reach 8 pmol/mL.

The invention discloses an electrochemical biosensor based on graphdiyne as well as a preparation method and application thereof, and the preparation method comprises the following steps: immobilizinga mode enzyme on the surface of the graphdiyne, mixing with a film-forming material to generate a composite material, and immobilizing the composite material on the surface of a glassy carbon electrode to obtain the electrochemical biosensor. The advantages of the graphdiyne which is a novel two-dimensional all-carbon nano material, such as a planar structure similar to graphene and other two-dimensional materials, a large comparison area, good aqueous phase dispersibility and a high conjugate structure, are fully utilized, the graphdiyne is used as an enzyme carrier of the sensor to preparethe biosensor, the preparation process is simple, and the cost is low; the complex sample pretreatment process is not needed, the detection sensitivity to bisphenol compounds is high, the detection limit is low, and the reproducibility is good; and the biosensor is quick in response to a target compound, easy to miniaturize, and suitable for point field detection, continuous online monitoring andthe like.

The invention discloses a method for patterning transfer of a graphdiyne film, and belongs to the field of processing of two-dimensional materials. The method comprises the following steps of: uniformly coating photoresist on a target substrate, carrying out patterning exposure and development, and exposing a place where the pattern of the graphdiyne film is expected to be transferred; transferring the graphdiyne film to the developed target substrate through a wet transfer method; and removing photoresist from the target substrate on which the graphdiyne film is transferred, so as to obtain the patterned graphdiyne film. The invention aims to overcome the defects of the prior art, and provides the method for patterned transfer of the graphdiyne thin film in the laboratory; the method is simple to operate; the precision and success rate of patterned transfer of the graphdiyne film are high; the obtained graphdiyne film is relatively clean; and the process problem that the transfer position, shape and size of the graphdiyne film are uncontrollable is solved.

The invention provides a method for researching seawater desalination with a hydroxyl functionalized single-layer film material. The method comprises the following steps: after standing and filteringof seawater, constructing a relationship of GO original structure, group modification construction of single-layer structures with different charged properties, modification density adjustment and construction of single-layer GO with different surface structures and construction of few-layer structures; constructing a relationship of graphdiyne or 2D-COF original structure, cavity adjustment and construction of single-layer structures with different cavity sizes, group modification construction of single-layer structures with different electrification properties and construction few-layer structures; carrying out molecular dynamics simulation on each component in the seawater; and constructing a relation model of seawater component, pore structures, microcosmic desalination mechanisms andmacroscopic desalination performances. By researching and revealing the internal mechanism of graphene-like seawater desalination, a theoretical basis is provided for the design of a novel desalination material.

The present invention relates to a graphdiyne synthesis method, which comprises that a copper foil or a copper-loaded substrate is adopted as a working electrode, and an electrolytic solution containing a graphdiyne precursor and an electrolyte is subjected to electrochemical treatment so as to generate graphdiyne. The graphdiyne synthesis method provided by the invention has the advantages of various synthesis means and simple and time-saving synthesis process, reduces the use of organic reagents, and is more green, economical, efficient and easy to industrialize.

The invention discloses a double-ended photoelectric memory and a preparation method and application thereof, the double-ended photoelectric memory comprises a conductive channel, a barrier layer, a tunneling layer and a top photosensitive floating gate which are sequentially arranged from bottom to top, and the top photosensitive floating gate is graphdiyne. According to the memory, graphdiyne serves as a top photosensitive floating gate, the graphdiyne has a natural band gap, strong light absorption capacity and a high-density state, a large number of electron hole pairs are generated underillumination, more charges can be stored, gate coupling ratio degradation and inter-unit interference are inhibited, so that the data storage capacity of the memory is improved and the working voltageis reduced. Meanwhile, the memory can be made into flexible equipment to be used for a wearable system, so that the miniaturization of the equipment is facilitated, and the integration density is improved.

The invention provides a graphdiyne and click chemistry-based copper ion detection method, a kit and an application. The detection method comprises the following steps of (1) adding a copper ion standard solution with a concentration gradient and a reducing agent into a mixed solution of graphdiyne and group-modified double-stranded DNA, mixing and reacting to obtain a reaction solution, testing the fluorescence intensity of the reaction solution by a fluorescence spectrometry, and drawing a standard curve according to the relationship between the concentration and the fluorescence intensity;(2) adding a to-be-detected sample solution and the reducing agent into the mixed solution of graphdiyne and the group-modified double-stranded DNA, mixing and reacting to obtain the reaction solution, testing the fluorescence intensity of the reaction solution according to fluorescence spectrometry, and quantifying the concentration of the copper ions in the to-be-detected sample according to thestandard curve obtained in the step (1). By selecting the graphite alkyne in a detection system, the situation that the alkynyl groups are used for modification is avoided, the detection efficiency can be greatly improved, and the operation steps are simplified.

The invention discloses a low contact resistance type resistance paste. The resistance paste comprises the following components in percentage by mass: 15-45% of conductive powder, 20-40% of a glass binding phase, 1-10% of an additive and 30-45% of an organic carrier, wherein the conductive powder is graphdiyne composite lead ruthenate prepared by a chemical deposition method, and the glass binding phase is lead borosilicate glass powder with the softening temperature of 500-600 DEG C. The resistance paste disclosed by the invention has the characteristics of good temperature coefficient and small contact resistance, and can meet the use requirements of resistance paste products for thick-film sliding resistors and electric tools.